JAVA 防止重复提交 防止用户重复提交数据拦截器_blade 防重复提交

通过拦截器拦截需要防重复添加的url接口，通过  历史的key:value，获取历史key的value值与当前valueNew检验，相同，提示重复提交      
key  ：用户（或者token）+url（请求接口）
value：请求的内容(params +  data)数据

@SameUrlData 的 value  默认  3秒内不允许重复提交相同数据
可以自定义

1、自定义注解  SameUrlData

自定义注解防止表单重复提交

package org.springblade.common.sameUrlData;
 
import java.lang.annotation.*;
 
/**
 * * 自定义注解防止表单重复提交
 */
@Inherited
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface SameUrlData {
    /**
     * 默认 3 秒不允许 重复新增
     * @return
     */
    long value() default 3L;
 
}

2、注册拦截器   WebMvcConfigExt =》WebMvcConfigurer

package org.springblade.common.sameUrlData;
 
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
 
import java.util.ArrayList;
import java.util.List;
 
/**
 * * 注册拦截器
 */
@Configuration
public class WebMvcConfigExt  implements WebMvcConfigurer {
 
    /**
     * 防止重复提交拦截器
     */
    @Autowired
    private SameUrlDataInterceptor sameUrlDataInterceptor;
 
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        // 避开静态资源
        List<String> resourcePaths = defineResourcePaths();
        registry.addInterceptor(sameUrlDataInterceptor).addPathPatterns("/**").excludePathPatterns(resourcePaths);// 重复请求
    }
 
    /**
     * 自定义静态资源路径
     *
     * @return
     */
    public List<String> defineResourcePaths() {
        List<String> patterns = new ArrayList<>();
        patterns.add("/assets/**");
        patterns.add("/upload/**");
        patterns.add("/error");
        return patterns;
    }
}

3、防止用户重复提交数据拦截器   SameUrlDataInterceptor =》HandlerInterceptorAdapter
 

package org.springblade.common.sameUrlData;
 
import com.alibaba.fastjson.JSONObject;
import com.baomidou.mybatisplus.core.toolkit.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springblade.core.redis.cache.BladeRedis;
import org.springblade.core.secure.utils.AuthUtil;
import org.springblade.core.tool.utils.SpringUtil;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;
 
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.lang.reflect.Method;
 
/**
 * * 防止用户重复提交数据拦截器
 */
@Component
public class SameUrlDataInterceptor extends HandlerInterceptorAdapter {
    private static Logger LOG = LoggerFactory.getLogger(SameUrlDataInterceptor.class);
 
    private static BladeRedis bladeRedis;
 
    public static BladeRedis getBladeRedis() {
        if (bladeRedis == null) {
            bladeRedis = SpringUtil.getBean(BladeRedis.class);
        }
        return bladeRedis;
    }
 
    /**
     * * 是否阻止提交,fasle阻止,true放行
     * * @return
     */
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        if (handler instanceof HandlerMethod) {
            HandlerMethod handlerMethod = (HandlerMethod) handler;
            Method method = handlerMethod.getMethod();
            SameUrlData annotation = method.getAnnotation(SameUrlData.class);
            if (annotation != null) {
                if (repeatDataValidator(request,annotation.value())) {
                    //请求数据相同
                    LOG.warn("please don't repeat submit,url:" + request.getServletPath());
                    JSONObject result = new JSONObject();
                    result.put("code", "400");
                    result.put("msg", "请勿重复请求");
                    result.put("success", "false");
                    response.setCharacterEncoding("UTF-8");
                    response.setContentType("application/json; charset=utf-8");
                    response.getWriter().write(result.toString());
                    response.getWriter().close();
                    //                    拦截之后跳转页面
                    //                    String formRequest = request.getRequestURI();
                    //                    request.setAttribute("myurl", formRequest);
                    //                    request.getRequestDispatcher("/WebRoot/common/error/jsp/error_message.jsp").forward(request, response);
                    return false;
                } else {//如果不是重复相同数据
                    return true;
                }
            }
            return true;
        } else {
            return super.preHandle(request, response, handler);
        }
    }
 
    /**
     * 验证同一个url数据是否相同提交,相同返回true
     *
     * @param httpServletRequest
     * @return
     */
    public boolean repeatDataValidator(HttpServletRequest httpServletRequest,Long seconds) throws IOException {
        BufferedReader streamReader = new BufferedReader(new InputStreamReader(httpServletRequest.getInputStream(), "UTF-8"));
        StringBuilder sb = new StringBuilder();
        String inputStr;
        while ((inputStr = streamReader.readLine()) != null) {
            sb.append(inputStr);
        }
        System.out.println("data===========" + sb.toString());
 
        String params = httpServletRequest.getQueryString();
        //获取请求参数map
 
        String token = AuthUtil.getUserId().toString();
 
        System.out.println("params===========" + params);
 
        String keyNew = (StringUtils.isBlank(params) ? "" : params) + "|" + (StringUtils.isBlank(sb.toString()) ? "" : sb.toString());
 
        String url = httpServletRequest.getRequestURI();
 
        String redisKey = "url:user:" + token + ":" + url;
        String preUrlParams = getBladeRedis().get(redisKey);
        if (StringUtils.isBlank(preUrlParams)) {
            //如果上一个数据为null,表示还没有访问页面
            //存放并且设置有效期，2秒
            getBladeRedis().setEx(redisKey, keyNew, seconds);
            return false;
        } else {//否则，已经访问过页面
            if (preUrlParams.equals(keyNew)) {
                //如果上次url+数据和本次url+数据相同，则表示重复添加数据
                return true;
            } else {//如果上次 url+数据 和本次url加数据不同，则不是重复提交
                getBladeRedis().setEx(redisKey, preUrlParams, seconds);
                return false;
            }
        }
    }
}

4、MVC 方法添加注解 @SameUrlData(value = 20L)
 

 /**
     * 新增 采购收货（检验收货）
     */
    @SameUrlData(value = 20L)
    @PostMapping("/savePurchaseDeliveryVO")
    @ApiOperationSupport(order = 4)
    @ApiOperation(value = "新增 采购收货（检验收货）", notes = "传入purchaseDelivery")
    public R<PurchaseDeliveryVO> savePurchaseDeliveryVO(@Valid @RequestBody PurchaseDeliveryVO purchaseDelivery) {
        return R.data(purchaseDeliveryService.savePurchaseDeliveryVO(purchaseDelivery));
    }